Question

sa se determine coordonatele varfului parabolei asociate functiei f:R⇒R,f(x)=x²-4x-5

Answer 1

-b/2a= 4/2= 2, f(2)= 4-8-5=-9, decit coordonatele varfului parabolei sunt (2;-9).

Answer 2

varful unei parabole are formula V($\frac{-b}{2a} , \frac{-delta}{4a}$) calculezi cele 2 si afli varful 
x varf =$\frac{4}{2} =2$
y varf=- $\frac{16+20}{4} =-9$
V(2,-9)